Cell Theory
Cells make up all living things.
True
What food cell looks similar to human cells?
banana cells
Robert Hooke
Who developed the theory that cells only come from other cells?
Rudolf Virchow
A__________ is the smallest structural and functional unit of an organism.
Cell
Cells can differ in shape and sizes, and the different shapes usually indicate different functions.
True
What is the relationship between tissues and organs?
Organs are formed from two or more specialized tissues working together to perform a job
1665
A _________ is the smallest level of organization
atom
All organisms are composed of _______
Cells
Bacteria consist of more than one cell.
Specialized cells can be organized into _________
Tissues
the cells of a piece of cork
These are cells are long and stringy
Nerve
Cells were first observed under a __________ microscope
light
Humans consist of hundreds of cells
False
TRILLIONS!
What type of microscope passes a beam of electrons through a cell to allow you to observe the inside of the cell?
an Electron Microscope
These cells are shaped like flat discs
Blood
A _______ is the largest level of organization
Organism
1. All organisms are composed of cells
2. All cells come from other cells
3. Things grow because their cells get larger
4. Cells are alive and the basic units or organization in all organisms
3. Things grow because their cells get larger
You can see cells without a microscope
__________ are formed from two or more specialized tissues working together to perform a job.
Organs
What cells are flat and fit tightly together
Skin cells
_______ systems work together to form the entire organism
Organ